# Stair Calculator Plus — Calculate Stair Rise and Run

> Stair design calculator for rise, run, rail angle, and stringer length. (iPhone/iPad app by Nitrio.)

- Source: https://appshunter.io/ios/app/stair-calculator-plus/id1442478865 (this page in markdown: same URL + `.md`)
- Developer: [Nitrio](https://appshunter.io/developer/321121189)
- Category: Utilities, Productivity
- Price: $2.99
- Rating: 3.00/5 from 18 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 12 · 8 MB
- Languages: American English
- Released: 2018-11-25
- Data updated: 2026-08-22
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/stair-calculator-plus/id1442478865/reviews.md

## What is Stair Calculator Plus?

Stair Calculator can be used to find stair rise and run, stair rail angle, stringer length, and other important factors of stair design. 

Features:
- Instant calculation
- Result are copy able to other app
- Formula are include as reference
- Support up to 16 decimal place
- Support various unit for each input

General guidelines in Stair Design :
- Run unit should not be less than 10 inches / 25 cm
- Rise unit should not exceed 7 3/4 inches / 20 cm

A stairway, staircase, stairwell, flight of stairs, or simply stairs is a construction designed to bridge a large vertical distance by dividing it into smaller vertical distances, called steps. Stairs may be straight, round, or may consist of two or more straight pieces connected at angles.

Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

## Key features

- Instant stair rise and run calculation
- Calculate stair rail angle
- Determine stringer length
- Support for 16 decimal places
- Multiple input units
- Copy results to other apps

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/stair-calculator-plus/id1442478865/reviews.md

### 1/5 — Doesn’t work.

*2025-04-18*

I read the reviews and bought it anyway. I screwed myself

### 1/5 — Stair calculator plus

*2021-04-07*

A total fraud. I want my money back

### 1/5 — Not good!

*2019-07-10*

I paid money to have this app close every time I open. I enter the run and it closes every time! Please fix this bug or give me my money back!

## Frequently asked questions about Stair Calculator Plus

### What is Stair Calculator Plus used for?

Stair Calculator Plus is used to calculate essential stair design elements such as rise, run, rail angle, and stringer length. It provides instant results with high precision, supporting up to 16 decimal places for accurate measurements.

### What are the key features of Stair Calculator Plus?

Key features include instant calculations for stair dimensions, support for various input units, the ability to copy results to other apps, and inclusion of formulas for reference. It also supports a high level of precision with up to 16 decimal places.

### How much does Stair Calculator Plus cost?

Stair Calculator Plus is a paid application priced at $2.99. There are no in-app purchases or subscriptions required after the initial purchase.

### Is Stair Calculator Plus available on Android?

Based on the provided data, Stair Calculator Plus is available for iOS devices including iPhone, iPad, and iPod. Information regarding Android availability is not specified.

### What is the age rating for Stair Calculator Plus?

Stair Calculator Plus has an age rating of 4+, making it suitable for a wide range of users. This indicates it contains no mature content.

### How often is Stair Calculator Plus updated?

The latest version of Stair Calculator Plus is 1.2, and it was last updated on December 17, 2025. This suggests relatively recent development activity.

### Does Stair Calculator Plus have ads?

No, Stair Calculator Plus does not contain advertisements. The app is ad-free, providing an uninterrupted user experience.

### What is the user feedback on Stair Calculator Plus?

Stair Calculator Plus has an average rating of 3.0 stars from 18 ratings. This indicates a mixed reception from its user base.

## Version history (last 3 releases)

### 1.2 — 2025-12-17

- Updated for the newest devices.
- Minor bugs fixed.

### 1.1 — 2020-09-12

- Update for Newest Devices.
- Bug Fixed.

### 1.0 — 2018-11-25

No release notes.

## Apps similar to Stair Calculator Plus

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [RedX Stairs - 3D Calculator](https://appshunter.io/ios/app/redx-stairs-3d-calculator/id1589688170) | 4.5 (406) | Free | Utilities |
| [Buildr - Building Calculator](https://appshunter.io/ios/app/buildr-building-calculator/id6446961698) | 4.8 (13) | Free | Utilities |
| [Stair Calculator: Construction](https://appshunter.io/ios/app/stair-calculator-construction/id1493037366) | 4.1 (738) | Free | Utilities |
| [Chippy Tools: Construction](https://appshunter.io/ios/app/chippy-tools-construction/id1579138717) | 4.5 (905) | Free | Utilities |
| [ROCK Jobsite](https://appshunter.io/ios/app/rock-jobsite/id1637132313) | 3.9 (98) | Free | Utilities |
| [Construction Master Pro Calc](https://appshunter.io/ios/app/construction-master-pro-calc/id370406446) | 4.8 (39,372) | Free | Utilities |

## More apps by Nitrio

- [Coloring Book - Plus](https://appshunter.io/ios/app/coloring-book-plus/id500418548)
- [Resistor Plus](https://appshunter.io/ios/app/resistor-plus/id500615686)
- [Premium Clock Plus](https://appshunter.io/ios/app/premium-clock-plus/id502784721)
- [Gold Luxury Clock](https://appshunter.io/ios/app/gold-luxury-clock/id505043266)
- [Ohm Law Calculator](https://appshunter.io/ios/app/ohm-law-calculator/id505900137)
- [Premium Clock](https://appshunter.io/ios/app/premium-clock/id517487778)

All apps by Nitrio: https://appshunter.io/developer/321121189

## Related topics

[stair calculator plus](https://appshunter.io/ios/topics/stair-calculator-plus) · [stair calculator 2](https://appshunter.io/ios/topics/stair-calculator-2) · [stair calculator pro](https://appshunter.io/ios/topics/stair-calculator-pro)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*